Head assembly of golf club

ABSTRACT

The head assembly of a golf club includes a sound generator or a vibration generator. The sound generator includes a sound hole formed in a head of a driver, a sound pipe attached to the head, and a sound generator attached to an iron. Using the head assembly, since the golfer slowly swings the golf club, improper rapid swing is prevented and head-up is also minimized.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a head assembly of golf clubs, and moreparticularly, to an improvement of a head of various golf clubs such asdrivers, irons, and putters, and fairway woods to enable a golfer toimprove their swing and to efficiently use the golf clubs.

2. Description of the Related Art

Golf is often referred to as a “mind game”, and a golfer's state of mindis of primary importance in the game of golf. Since the golfer'spersonality influences their golf game, it is difficult to gain skill ingolf. In particular, when novices swing a golf club they may becomeaccustomed to an undesirable golf pose. As such most novices havedifficulty in improving their swing.

Generally, there are various important factors in playing golf, whichgolfers have difficulty in easily learning, as follows. First, a golfclub must be slowly backswung so as to precisely drive a golf ball alonga predetermined lie without disturbing swing when backswinging with thegolf club. Second, cocking, i.e. striking the golf ball or swinging witha golf club only using the golfer's wrists must be minimized. Thegolfer's left shoulder must be slowly turned for slow swing whilepreventing the golfer's body from recoiling when starting the backswing(a motion of moving a golf club for a shot). Third, the downswing mustbe performed after pausing the head of the golf club at the peak of thebackswing stroke. The lower part of the golfer's body must be preventedfrom vibrating when performing the backswing.

Although novices consciously try to learn proper swing techniqueaccording to the various factors, since most novices is psychologicallyhasty and cannot visually concentrate the golfer's eyes upon a golfball, goals, which the novices want to achieve, are not achieved.Moreover, since the novices cannot strike the golf ball as their wisheswhen the novices concentrate their efforts to improve their swings, thenovice cannot swing according to the various factors.

SUMMARY OF THE INVENTION

Therefore, the present invention has been made in view of the aboveproblems, and it is an object of the present invention to provide a headassembly of golf clubs, such as putters, irons, drivers (includingfairway woods), enabling a golfer to improve golf swing mentallyinfluence, to aim a head of the golf club when swinging the golf club,to improve their grip of the golf club, to improve their swing, and toimprove their drive.

In accordance with the present invention, the above and other objectscan be accomplished by the provision of a head assembly of a golf clubincluding a sound generating device including one or a combination of atleast two of the group of at least a single sound pipe for communicatinga cavity formed in a body of a head of a driver with exterior, a soundslit formed in the sound pipe, and a sound hole formed in the head.

Preferably, the cavity of the body of the head of the driver is dividedby at least one partition.

In accordance with the present invention, the above and other objectscan be accomplished by the provision of a head assembly of a golf clubincluding a sound generating device including at least one metalresonant wall for dividing a cavity formed in a body of a head of adriver, and regularly or irregularly arranged to divide a part or wholeof the cavity.

In accordance with the present invention, the above and other objectscan be accomplished by the provision of a head assembly of a golf clubincluding a sound generating device, the sound generating deviceincluding a connection shaft installed to a center of gravity toward thewall of the cavity in a cavity of a body of a head of a driver, and avibration pipe or a vibration ball installed to an end of the connectionshaft.

In accordance with the present invention, the above and other objectscan be accomplished by the provision of a head assembly of a golf clubincluding a sound generating device, the sound generating deviceincluding a hollow sound device installed to a rear side of a face of ahead of an iron and having various shapes such as a golf ball shape, atleast one sound hole formed in the hollow sound device and havingvarious shapes, and a sound slit.

In accordance with the present invention, the above and other objectscan be accomplished by the provision of a head assembly of a golf clubincluding a sound generating device including an sighting plateextending from the upper surface of a head of a putter to the rear sidethereof, and a sound generating device detachable to the lower side ofthe sighting plate and including a sound unit for accommodating a sounddisc or a sound ball guided by a slope and colliding against the wall ofthe head to generate sound and vibration when the head is positioned atthe peak of the backswing stroke.

In accordance with the present invention, the above and other objectscan be accomplished by the provision of a head assembly of a golf clubincluding a sound generating device including a plurality of metal soundfins extending from the rear side of a head of a putter and installed atregular intervals to generate sound due to vibration.

In accordance with the present invention, the above and other objectscan be accomplished by the provision of a head assembly of a golf clubincluding a sound generating device, the sound and vibration generatingdevice including a hollow sensing pipe fixed to a bottom surface of ahead in a cavity of a body of the head of a driver, closed by a cap, andhaving a closed end, and at least one sensing ball inserted into thehollow sensing pipe and colliding against the closed end to generatesound or vibration when the head is positioned at peak of the swingstroke.

Since the head assembly of a golf club in accordance with the presentinvention includes a sound generating device or a vibration generatingdevice installed to a head, the golfer can utilize their senses toimprove their golf game. Thus, the golfer can accustom himself/herselfto smoothly and slowly swinging the golf club. Moreover, the golfer canprevent improper swing, i.e. the backswing during the putter swing.

BRIEF DESCRIPTION OF THE DRAWINGS

These and/or other objects and advantages of the present invention willbecome apparent and more readily appreciated from the followingdescription of the embodiments, taken in conjunction with theaccompanying drawings, in which:

FIG. 1 a is a perspective view illustrating a head assembly of a golfclub according to a first preferred embodiment of the present inventionapplied to a driver;

FIG. 1 b is a sectional view taken along the line A-A in FIG. 1 a;

FIG. 1 c is a sectional view illustrating a first modification of thehead assembly according to the first preferred embodiment of the presentinvention taken along the line A-A in FIG. 1 a;

FIG. 1 d is a sectional view illustrating a second modification of thehead assembly according to the first preferred embodiment of the presentinvention taken along the line A-A in FIG. 1 a;

FIG. 1 e is a sectional perspective view illustrating a thirdmodification of the head assembly according to the first preferredembodiment of the present invention;

FIG. 1 f is a sectional perspective view illustrating a fourthmodification of the head assembly according to the first preferredembodiment of the present invention;

FIG. 1 g is a sectional perspective view illustrating a fifthmodification of the head assembly according to the first preferredembodiment of the present invention;

FIG. 1 h is a sectional perspective view illustrating a sixthmodification of the head assembly according to the first preferredembodiment of the present invention;

FIG. 1 i is a sectional perspective view illustrating a seventhmodification of the head assembly according to the first preferredembodiment of the present invention;

FIG. 2 a is a partially sectional perspective view illustrating a headassembly of a golf club according to a second preferred embodiment ofthe present invention applied to a driver;

FIG. 2 b is a partially sectional perspective view illustrating a firstmodification of the head assembly of a golf club according to the secondpreferred embodiment of the present invention;

FIG. 2 c is a partially sectional perspective view illustrating a secondmodification of the head assembly of a golf club according to the secondpreferred embodiment of the present invention;

FIG. 2 d is a partially sectional perspective view illustrating a thirdmodification of the head assembly of a golf club according to the secondpreferred embodiment of the present invention;

FIG. 2 e is a partially sectional perspective view illustrating a fourthmodification of the head assembly of a golf club according to the secondpreferred embodiment of the present invention;

FIG. 2 f is a partially sectional perspective view illustrating a fifthmodification of the head assembly of a golf club according to the secondpreferred embodiment of the present invention;

FIG. 3 a is a perspective view illustrating the lower side of a headassembly of a golf club according to a third preferred embodiment of thepresent invention applied to a driver;

FIG. 3 b is a sectional view taken along the line B-B in FIG. 3 a;

FIG. 3 c is a sectional view illustrating a first modification of thehead assembly according to the third preferred embodiment of the presentinvention taken along line B-B in FIG. 3 a;

FIG. 4 a is a perspective view illustrating a head assembly of a golfclub according to a fourth preferred embodiment of the present inventionapplied to a putter;

FIG. 4 b is a perspective view illustrating a first modification of thehead assembly according to the fourth preferred embodiment of thepresent invention applied to an iron;

FIG. 4 c is a perspective view illustrating a second modification of thehead assembly according to the fourth preferred embodiment of thepresent invention applied to an iron;

FIG. 5 a is a rear-side perspective view illustrating a head assembly ofa golf club according to a fifth preferred embodiment of the presentinvention applied to a putter;

FIG. 5 b is an exploded perspective view illustrating the head assemblyof a golf club according to the fifth preferred embodiment of thepresent invention in FIG. 5 a;

FIG. 5 c is a sectional view taken along line C-C in FIG. 5 c;

FIG. 5 d is a sectional view illustrating a first modification of thehead assembly according to the fifth preferred embodiment of the presentinvention;

FIG. 6 a is a perspective view illustrating a head assembly of a golfclub according to a sixth preferred embodiment of the present inventionapplied to a putter;

FIG. 6 b is a sectional view taken along line D-D in FIG. 6 a;

FIG. 7 a is a perspective view illustrating a head of a head assembly ofa golf club according to a seventh preferred embodiment of the presentinvention, applied to a driver, with a cover removed;

FIG. 7 b is a lower-side exploded perspective view illustrating the headassembly of a golf club according to the seventh preferred embodiment ofthe present invention in FIG. 7 a;

FIG. 7 c is a view illustrating a modification of the head assembly of agolf club according to the seventh preferred embodiment of the presentinvention;

FIG. 7 d is a sectional view illustrating a head before striking a golfball with the head assembly of a golf club according to the seventhpreferred embodiment of the present invention; and

FIG. 7 e is a sectional view illustrating a head after striking a golfball with the head assembly of a golf club according to the seventhpreferred embodiment of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

The structure and aspects of a head assembly of a golf club according tothe present invention are applicable to all golf clubs. Hereinafter, thestructure and operation of the head assembly of a golf club according tothe preferred embodiments of the present invention and itsmodifications, applied to drivers (including irons) and putters, will bedescribed in detail in conjunction with the accompanying drawings.Although the head assembly of the preferred embodiments of the presentinvention and the modifications are applied to different kinds of golfclubs, the same reference numerals are assigned to identical elements ofa head.

Embodiment 1

FIG. 1 a shows a head assembly of a golf club according to a firstpreferred embodiment of the present invention applied to a head H of adriver D1. The head assembly, according to the first preferredembodiment of the present invention, is applied to the driver D1 havinga cavity CV formed in the driver D1. The head assembly according to thisembodiment includes plural sound pipes 1, 2, and 3, which are extendedfrom the back of a face F of the head H to the cavity CV of a body BD ofthe driver D1 and are fixed to the body BD.

Moreover, as shown in FIG. 1 b illustrating a first modification of thehead assembly of a golf club according to the first preferred embodimentof the present invention, the sound pipes 1, 2, and 3 are integrallyfixed to a wall H′ for forming the driver D1. The first modification ofthe head assembly further includes a partition P installed to theintermediate portion of the cavity CV and to divide the cavity CV intotwo spaces so as to separate the space where the sound pipes 1, 2, and 3are installed from the remainder of the cavity CV, thereby effectivelygenerating sound.

FIG. 1 c shows various modifications of the sound pipes, employed in thefirst modification of the head assembly according to the first preferredembodiment of the present invention, in a single driver for theillustrative purpose.

As shown in the drawing, a sound pipe 11 integrally formed with a wallH′ for forming the head H of a driver D2 and having threads 11′ formedin the inner wall thereof, a sound pipe 12 fixed to the wall H′ of thehead H of the driver D2 by a screw or by welding after press-fitting, asound pipe 13 having a closed end 13′ and an inner wall without threadsand fixed to the wall H′ for forming the head H of the driver D2, and asound pipe 14 having a sound generating slit 14′ for easily generatingsound are installed to a single driver for illustrative purposes.However, when the sound pipes 11, 12, 13, and 14 are practicallyinstalled to the head H, one or more of the sound pipes 11, 12, 13, and14 may be installed to the driver D2. The thread and the soundgenerating slit cause an air vortex which easily generates sound.

FIG. 1 d shows a second modification of the head assembly according tothe first preferred embodiment of the present invention. As shown in thedrawing, the second modification of the head assembly according to thefirst preferred embodiment of the present invention includes a pluralityof sound pipes 21, 22, and 13 alternately installed to the wall H′ ofthe body BD for forming a head H of a driver D3.

As shown in FIG. 1 e, a third modification of the head assemblyaccording to the first preferred embodiment of the present inventionincludes a plurality of longitudinal sound slits 21, 32, 33, and 34formed in a wall H′ of a body BD of a driver D4 in the longitudinaldirection. A fourth modification of the head assembly according to thefirst preferred embodiment of the present invention, as shown in FIG. 1f, includes a plurality of sound holes 41, 42, 43, and 44 formed in awall H′ of a body BD of a driver D5. A fifth modification of the headassembly according to the first preferred embodiment of the presentinvention, as shown in FIG. 1 g, includes a plurality of star-shapedsound holes 51, 52, 53, and 54 formed in a body BD of a driver D6.

If necessary, the head assembly of a golf club according to the firstpreferred embodiment of the present invention may include rubber orsynthetic resin cap (not shown) for closing the sound slits and thesound holes so that a head employing the head assembly of a golf clubaccording to the first preferred embodiment of the present invention maybe used as a general head of a golf club.

In addition, a sixth modification of the head assembly according to thefirst preferred embodiment of the present invention, as shown in FIG. 1h, includes a single long sound slit 55 formed in a body BD of a driverD7 having a partition P. A seventh modification of the head assemblyaccording to the first preferred embodiment of the present invention, asshown in FIG. 1 i, includes a long sound slit 56 formed in a streamlinedconcave side face F.

As described above, the head assembly of a golf club according to thefirst preferred embodiment of the present invention can be applied todrivers having various configurations and structures, and its concept isto generate sound using friction between air and the sound slits or thesound holes generated when the head of the golf club is swung over apredetermined speed.

In other words, according to the head assembly of a golf club accordingto the first preferred embodiment of the present invention, airgenerates sound due to rapid angular speed of the head assembly duringthe backswing when passing through the sound slits or the sound holes.Therefore, a golfer repeats motion of slowly swinging the golf club toprevent sound from being generated during the backswing so that thegolfer accustoms himself/herself to a slow backswing.

Embodiment 2

FIGS. 2 a is a perspective view illustrating a head assembly of a golfclub according to a second preferred embodiment of the present inventionapplied to a driver. The second preferred embodiment is describedtogether with various modifications.

A head H of a driver D9 includes a cavity CV formed in the head H, and aresonant wall W installed in the cavity CV of a body BD connected to aface F of the head to generate sound. The resonant wall W is a metalwall with a sufficient thin thickness for dividing the cavity CV intotwo hollow spaces G1 and G2. The resonant wall W is made of the samematerial as that of the head H of the driver D9 and is integrally formedwith the head H or is separately made of a resonant metal plate andfixed in the cavity CV.

As shown FIG. 2 b, a driver D10 of a first modification of the headassembly of a golf club according to the second preferred embodiment ofthe present invention includes a plurality of resonant walls W1 and W2.As shown in FIG. 2 c, a driver D11 of a second modification of the headassembly of a golf club according to the second preferred embodiment ofthe present invention includes a single partial resonant wall WP1 or atleast two partial resonant walls WP1 and WP2, installed to a wall of thecavity CV.

As shown in FIG. 2 d, a driver D12 of a third modification of the headassembly of a golf club according to the second preferred embodiment ofthe present invention includes partial resonant walls WP3, WP4, and WP5,alternately arranged in the cavity CV.

In the fourth and fifth modifications of the head assembly of a golfclub according to the second preferred embodiment of the presentinvention shown in FIGS. 2 e and 2 f, a driver D13 includes partialresonant walls WP6 and WP7 installed to the rear wall of the cavity CV,i.e. the inner wall opposite to the face F, a driver D14 includespartial resonant walls WP8 and WP9 crossing each other within the cavityCV.

The resonant walls W, W1, and W2 . . . , and the partial resonant wallsWP, WP1, and WP2 . . . are made of metal plates. Preferably, when thehead H of the driver is vibrated by external impact, the resonant wallsW, W1, and W2 . . . and the partial resonant walls WP, WP1, and WP2 . .. are made of materials and have thicknesses to generate sounds due tothe vibration of the head H of the driver.

Embodiment 3

Generally, drivers D are manufactured via mechanical processes such asmolding, forging, or the like. As shown in FIG. 3 s, a head H of adriver D15, employing a head assembly of a golf club according to athird preferred embodiment of the present invention, includes a face Fand a body BD connected to the face F to form a cavity CV therein. Thebody BD is integrally formed with the face F or is fixed to the face F.

The head assembly of a golf club according to the third preferredembodiment of the present invention further includes a vibrationgenerating device R installed in the cavity CV. The vibration generatingdevice R, as shown in FIG. 3 b, includes an elastic connection rod 60such as a coil spring installed to a center of gravity G of the rearface of the face F in the cavity CV formed in the body BD, and a metalball, such as a steel ball, fixed to a free end of the elasticconnection rod 60.

The vibration generating device R of a modification of the head assemblyof a golf club according to the third preferred embodiment of thepresent invention applied to a driver D16, as shown in FIG. 3 c,includes a connection shaft 62 such as a steel plate, an elastic metalplate, or a fixing pipe instead of the elastic connection rod 60, and avibration pipe 63 fixed to a free end of the connection shaft 62, andits operation is identical to that of the vibration generating device Rshown in FIG. 3 b.

In these structures, optimal weight of the metal ball 61 and thevibration pipe 63 can be obtained by repeating experiments like theoperation and effect of the present invention described later. Moreover,since the optimal weight varies according to the kind of golf club andthe manufacturer, detailed data will not be provided in the description.

More preferably, as shown in FIGS. 3 b and 3 c, the face F has an outerportion with a thickness T greater than the thickness t of a centralportion of the face F so that elasticity of the face F is increased toeasily generate vibration.

According to the second and third preferred embodiments of the presentinvention, when striking a golf ball (not shown) with the driver,specific sound or vibration is generated by the resonant walls W, W1,and W2 . . . , the partial resonant walls WP, WP1, and WP2 . . . of thesecond preferred embodiment of the present invention, or the ball 61 andthe vibration pipe 63 of the third preferred embodiment of the presentinvention in accordance with swing conditions.

In other words, when proper swing is performed, normal sound isgenerated or vibration transmitted to the golfer's hands is generated.On the other hand, when the club is improperly swung, sound or vibrationcorresponding to the improper swing is generated. Thus, when the golfertrains using the golf clubs employing the head assembly according to thepreferred embodiments, the golfer understands the sound generated whenthe optimal swing performed. Thus the golfer trains the golf swing toprevent the sound generated when improper swing is performed from beinggenerated, thereby improving the golfer's improper swing.

Embodiment 4

As shown in FIG. 4 s, a head assembly of a golf club according to afourth preferred embodiment of the present invention applied to an ironI1 includes a variously shaped hollow sound device 70 installed to arear surface of a face F.

The sound device of a first modification of the head assembly of a golfclub according the fourth preferred embodiment of the present inventionapplied to the iron I1, as shown in FIG. 4 b, is made of variousmaterials and has a golf ball shape or a hollow semispherical shape. Asound device 80 of a second modification of the head assembly of a golfclub according to the fourth preferred embodiment of the presentinvention, as shown in FIG. 4 c, has quarter spherical shape and may bemade of various materials.

These sound devices 70, as shown in FIG. 4 a, have star-shaped soundholes 71, 72, and 73, or sound slits 74, 75, and 75 as shown in FIG. 4 billustrating the first modification of the head assembly, and the sounddevice 80, as shown in FIG. 4 c illustrating the second modification ofthe head assembly, has circular sound hole 81, 82, and 83, so that asound generating device can be structured.

Operation and effects of the head assembly of a golf club according tothe fourth preferred embodiment of the present invention are identicalto those of the head assembly of a golf club according to the firstpreferred embodiment of the present invention.

Embodiment 5

FIG. 5 a shows a head assembly of a golf club according to a fifthpreferred embodiment of the present invention applied to a putter P1. Asshown in the drawing, preferably, a sound device of the putter P1includes an sighting plate GP extending from an upper plate U of a headH backward and integrally formed with the upper plate U to help thegolfer aim when putting a golf ball, and a cavity CP depressed from therear central portion of a face F of the head H. The cavity CP, as shownin FIG. 5 c depicting a sectional view taken along the line C-C, isdefined by the upper plate U, the face F, and a lower plate W of thehead H.

A sound generating device of the head assembly of a golf club accordingto the fifth preferred embodiment of the present invention includes asound unit K installed between the cavity CP and the sighting plate GPor integrally formed with the sighting plate GP. The sound unit Kincludes an approximate box-shaped unit box 100, made of metal orsynthetic resin and fixed to the head H.

The unit box 100 of the sound unit K, as shown in FIG. 5 b, accommodatesan integrated metal sound disc 110 with a predetermined diametertherein. The sound disc 110 includes an elastic ring 110 inserted intothe outer circumference of the sound disc 110 to absorb shock and aguide groove 112 formed in the outer circumference of the sound disc 110below the position of the elastic ring 111.

The sound disc 110 is accommodated in a guide channel 121 upwardlyslanted toward the face F of the head H and guide rails 120 formed inthe guide channel 121 are inserted into a guide groove 112 of the sounddisc 110, such that the sound disc 110 freely slides along the guidechannel 121.

The unit box 100, as shown in FIG. 5 c, includes the guide rails 120downwardly slanted toward the rear side of the sighting plate P, and aslope a of the guide rails 120 is determined by experimentation.

Operation and effects of the head assembly of a golf club according tothe fifth preferred embodiment of the present invention will bedescribed as follows.

When the golfer take an initial pose for putting with the putter P1 inFIG. 5 c, the putter P1 is level with the ground, and the sound disc 110is positioned at the rear side of the unit box 100 due to the slope a ofthe guide rails 120.

Under these conditions, if the golfer rapidly backswings the putter P1,a horizontal directional component force, greater than friction betweenthe sound disc 110 and the guide rails 120, is generated due to theslope a, and the sound dis 110 moves from the rear side of the unit box100 to the face F of the head H of the putter P1.

At that time, the sound disc 110 collides against the wall of the unitbox 100 to generate sound and vibration. Thus, the golfer understandsthat the golfer rapidly backswings, i.e. abnormally backswings.

Moreover, during the downswing, the golfer putts to prevent thehorizontal directional component force, greater than the friction due tothe slope a of the unit box 100, from being generated so that the golfcan accustom himself/herself to a slowly downswing of the putter P1.Cocking (putting with the wrists) can also be prevented according to thesame principle as illustrated above.

A putter P2, as shown in FIG. 5 d, includes a unit box 140 having asound ball 130 instead of the sound disc 110 and a guide pipe 141instead of the guide channel 121, and its operation and effect areidentical to those of the putter P1.

Embodiment 6

In a sixth preferred embodiment of the present invention, a soundgenerating device is installed to a head H of a putter P3.

The putter P3 includes a sighting plate GP integrally extending from anupper plate U of the head H to help the golfer aim, and a cavity CPdepressed from the rear central portion of a face F of the head H. Asshown in FIG. 6 b showing a sectional view taken along the line D-D, thecavity CP is preferably defined by the upper plate U, the face F, and alower plate W. A sound generating device of the head assembly of a golfclub according to the sixth preferred embodiment of the presentinvention includes a plurality of sound fins 150, 151, and 152, fixed atregular intervals to a rear surface Hg of the head H, made of metalplates with a predetermined thickness sufficient to easily generatesound, and generating sound when swung.

Embodiment 7

A head assembly of a golf club according to a seventh preferredembodiment of the present invention applied to a driver D17 will bedescribed in detail with reference to FIGS. 7 a to 7 e.

As shown in the drawings, the head assembly of a golf club according tothe seventh preferred embodiment of the present invention is depicted inthe drawings by removing a crown, i.e. the upper side of the head H. Ahollow sensing pipe 160 is fixed to a bottom surface OB of a cavity CVto have a slope b near a neck N, to which a shaft (not shown) isinstalled, and is made of various materials. The hollow sensing pipe 160has an opened end connected to an installation hole 162 of the bottomsurface OB and a closed rear end. Moreover, as shown in FIG. 7 b, theinstallation hole 162 has threads 162′ formed in the inner circumferencethereof and a cap 163 couple with the installation hole 162 is formedwith threads 163′. A sensing ball 161, having a slightly smallerdiameter than the inner diameter of the hollow sensing pipe 160, isinserted into the installation hole 162 from a lower surface 164 of thehead H, and the cap 163 closes the installation hole 162.

A single or more sensing ball 161 is made of metal and inserted into theinstallation hole 162.

The sensing ball 161 is inserted into the sensing pipe 160 to freelymove within the hollow sensing pipe 160. If necessary, withdrawing thesensing ball from the sensing pipe 160 after opening the cap 163, thehead assembly of a golf club according to the seventh preferredembodiment of the present invention may be used as a general head of agolf club without the sensing ball 161. The slope b can be variouslydetermined by experiments and according to the kind and specificationsof the driver D17 employing the head assembly of a golf club accordingto the seventh preferred embodiment of the present invention.

As shown in FIG. 7 d illustrating the driver D17 employing the headassembly of a golf club according to the seventh preferred embodiment ofthe present invention, since, in the head H of the driver D17 directlybefore a normal swing is performed, the sensing pipe 160 is inclined tothe neck B, i.e. the toe by the slope b, the sensing ball 161 is stablyaccommodated near the neck N in the sensing pipe 160.

In this state, the golfer backswings, the sensing ball 161 keeps itsoriginal position in the sensing pipe 160 due to the stationary inertiaof the sensing ball 161 generated by backswing and the geometricalstructure of the sensing pipe 160 before the head H reaches the peak ofthe backswing stroke. However, when the head H reaches the peak of thebackswing stroke, the angular speed of the head H is 0 (zero) and thehead H and the sensing pipe 160 are turned over. At that time, thesensing ball 161 loses the stationary inertia and rolls down along thesensing pipe 160 due to gravity.

The sensing ball 161 collides against the closed end of the sensing pipe160 to generate sound and vibration. The golfer feels the vibrationtransmitted to the golfer's hands gripping the golf club and hears thesound so that the golfer understands that the head H reaches the peak ofthe backswing stroke. Thus, after this, the golfer understands that thebackswing must be paused at the peak for a while and downswing must beslowly performed.

As shown in FIG. 7 c, the installation angle and direction of thesensing pipe 161 where the position of the sensing ball 161 is turnedover in the sensing pipe 160 of the driver D17 at the peak of thebackswing stroke are suggested. In other words, as shown in FIG. 7 c,the sensing pipe 160 may be installed to the driver D17 in the directionof A-A′ or B-B′.

Thus, when training using the head employing the head assembly of a golfclub according to this preferred embodiment of the present invention,the golfer can perfect their backswing, whereby the golfer correctlyhits the golf ball with the golf club to lengthen the distance.

When using the head employing the head assembly of the presentinvention, the golfer hears sound generated due to the various soundgenerating devices and air flowed by rapid change of angular speed ofthe head during the backswing and senses vibration generated by thevibration generating devices. Thus, since the golfer slowly swings thegolf club to prevent the sound from being generated, rapid backswingthat is apt to be the worst swing is corrected. Thus, the rapid swing isprevented and head-up that must be restricted is also minimized.

Although the preferred embodiments of the present invention have beendisclosed for illustrative purposes, those skilled in the art willappreciate that various modifications, additions and substitutions arepossible, without departing from the scope and spirit of the inventionas disclosed in the accompanying claims.

1. A head assembly of a golf club comprising a sound generating deviceincluding one or a combination of at least two of the group of at leasta single sound pipe for communicating a cavity formed in a body of ahead of a driver with exterior, a sound slit formed in the sound pipe,and a sound hole formed in the head.
 2. The head assembly of a golf clubas set forth in claim 1, wherein the cavity of the body of the head ofthe driver is divided by at least one partition.
 3. A head assembly of agolf club comprising a sound generating device including at least onemetal resonant wall for dividing a cavity formed in a body of a head ofa driver, and regularly or irregularly arranged to divide a part orwhole of the cavity.
 4. A head assembly of a golf club comprising asound generating device, the sound generating device comprising: aconnection shaft installed to a center of gravity toward the wall of thecavity in a cavity of a body of a head of a driver; and a vibration pipeor a vibration ball installed to an end of the connection shaft.
 5. Ahead assembly of a golf club comprising a sound generating device, thesound generating device comprising: a hollow sound device installed to arear side of a face of a head of an iron and having various shapes suchas a golf ball shape; at least one sound hole formed in the hollow sounddevice and having various shapes; and a sound slit.
 6. A head assemblyof a golf club comprising a sound generating device comprising: ansighting plate extending from the upper surface of a head of a putter tothe rear side thereof; and a sound generating device detachable to thelower side of the sighting plate and including a sound unit foraccommodating a sound disc or a sound ball guided by a slope andcolliding against the wall of the head to generate sound and vibrationwhen the head is positioned at the peak of the backswing stroke.
 7. Ahead assembly of a golf club comprising a sound generating deviceincluding a plurality of metal sound fins extending from the rear sideof a head of a putter and installed at regular intervals to generatesound due to vibration.
 8. A head assembly of a golf club comprising asound generating device, the sound and vibration generating devicecomprising: a hollow sensing pipe fixed to a bottom surface of a head ina cavity of a body of the head of a driver, closed by a cap, and havinga closed end; and at least one sensing ball inserted into the hollowsensing pipe and colliding against the closed end to generate sound orvibration when the head is positioned at peak of the swing stroke.